Precision vs. Accuracy in Measurements Steps:

• True value of g is approximately 9.8 m/s².
• Calculate mean for each set: A (8.3), B (9.55), C (9.88), D (10.13).
• Assess precision by spread: A (range 2.2, low), B (range 0.68, moderate), C (range 0.07, high), D (range 0.1, high).
• Assess accuracy by deviation of mean from 9.8: A (1.5 low), B (0.25 low), C (0.08 low), D (0.33 high).

Why D is correct:

• High precision due to tight clustering (small deviations among values); low accuracy as mean (10.13) deviates systematically from true g (9.8) by 0.33 m/s².

Why the others are wrong:

• A: Low precision (wide spread) and low accuracy (mean too low).
• B: Moderate precision (noticeable spread) and moderate accuracy (mean slightly low).
• C: High precision (tight cluster) and high accuracy (mean very close to true value).

Final answer: D